How much weight to add #/ET question
Thread Starter
11 Second Club
Joined: Jul 2005
Posts: 1,089
Likes: 3
From: West Linn, Oregon
How much weight to add #/ET question OK, so I have a slow car and can't hang with the heads up guys so I mainly do index racing. This past weekend I tried to add weight to get to the 12.0 index. First round I added 100# and pulled an 11.77 @ 115, the next round of qualifyling I added another 40# (I had no more room to add more) and a more restrictive muffler and pulled and 11.88 @ 114 and ended up qualifying 2nd to last. On the first round elims I got knocked out because even plaing on and off the gas (3X) before the finish line I ran under with an 11.986 @ 108.
So I am trying to figure out how much weight I need to add to get closer to my intended index. Is there some sort of set theory/calculation to figure out how and where to best add weight?
So I am trying to figure out how much weight I need to add to get closer to my intended index. Is there some sort of set theory/calculation to figure out how and where to best add weight?
9 Second Club
Joined: Feb 2002
Posts: 2,252
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From: Tampa, FL
idler pulley came off, lost the belt, battery was too weak (10.8v) and all the bells and whistle warning prevented me from making a pass.
Hind sight, I should have bought a fresh battery like i planned last winter but could not decide which I wanted. I was going to buy one and go to the grove but figured with my luck so far this year, that would not be the only problem and I would have set a torch to the torch red car
Hind sight, I should have bought a fresh battery like i planned last winter but could not decide which I wanted. I was going to buy one and go to the grove but figured with my luck so far this year, that would not be the only problem and I would have set a torch to the torch red car
Thread Starter
11 Second Club
Joined: Jul 2005
Posts: 1,089
Likes: 3
From: West Linn, Oregon
I hear ya, I had battery issue at the Grove on sunday myself, my 2+ year old pc680 decided that after it fully lost it's charge over this past winter that it doesn't want to hold a charge any more. I am expecting a few boxes from Summit tomorrow to do the full relocation and get a bigger battery, because I am tired of shutting it off in the lanes and not being able to restart it even after it sat on the charger the whole time between rounds...
9 Second Club
Joined: Feb 2002
Posts: 2,252
Likes: 0
From: Tampa, FL
I hear ya, I had battery issue at the Grove on sunday myself, my 2+ year old pc680 decided that after it fully lost it's charge over this past winter that it doesn't want to hold a charge any more. I am expecting a few boxes from Summit tomorrow to do the full relocation and get a bigger battery, because I am tired of shutting it off in the lanes and not being able to restart it even after it sat on the charger the whole time between rounds...
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Thread Starter
11 Second Club
Joined: Jul 2005
Posts: 1,089
Likes: 3
From: West Linn, Oregon
I am mainly looking for future races, when I have the tune set for the weather, but need to pull a few tenths without the finish line games...
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Drive the big end that way if it slows down you would have enough et to still take the stripe. I would try to set it up between 1192-1195. Maybe add another 50lbs to what you have now.
im guessin unlocking your converter would cost you 4-6 tenths...i think you could change just hat one thing and make the car run what you want it to...no huge change in the tune...OR dail it in and make it lock at 70 or 90 ect to make it perfect then you can just change one thing in your tune and know what the car will run, change a few mph to make up for weather
I know the sparetire well fits a 50lb sand bag perfect in our cars and covers in with that plastic piece(it will not move one bit)
make sure any balast you put in is very secure
you could put an adustable metal piece under the gas pettle if the class allows
if you run slicks with tubes take as much air out as you feel safe
rev limit during pass if rules allow you to
play around with launch rpm(watch your reaction times dont change too much)
deep stage(again watch reaction times)
make sure any balast you put in is very secure
you could put an adustable metal piece under the gas pettle if the class allows
if you run slicks with tubes take as much air out as you feel safe
rev limit during pass if rules allow you to
play around with launch rpm(watch your reaction times dont change too much)
deep stage(again watch reaction times)
Thread Starter
11 Second Club
Joined: Jul 2005
Posts: 1,089
Likes: 3
From: West Linn, Oregon
it is strange my reaction time is always slightly quicker in the elimination rounds then they were in qualifying, now they are not great by any means, but they are decent. .090 and .091 in qualifying and .071 in the elims and that is about average for me foot breaking on a pro tree...
Thread Starter
11 Second Club
Joined: Jul 2005
Posts: 1,089
Likes: 3
From: West Linn, Oregon
hey, I just came acrossed these from that race detailed above...
1st round qualifying for the index class (I got there late so I am the last car qualifying) I'm @ 8:55 http://www.youtube.com/watch?v=QVKKi2z3u0o
2nd round qualifying, I'm @ 2:54 http://www.youtube.com/watch?v=B58rJRdNkfQ
and 1st round eliminations I'm 50 seconds into this one http://www.youtube.com/watch?v=8sEUUnP2_n8
you really can find anything on youtube...
1st round qualifying for the index class (I got there late so I am the last car qualifying) I'm @ 8:55 http://www.youtube.com/watch?v=QVKKi2z3u0o
2nd round qualifying, I'm @ 2:54 http://www.youtube.com/watch?v=B58rJRdNkfQ
and 1st round eliminations I'm 50 seconds into this one http://www.youtube.com/watch?v=8sEUUnP2_n8
you really can find anything on youtube...
6 & 8 Second Club
Joined: Aug 2006
Posts: 2,284
Likes: 0
From: Illinois, RT 66 dragway area
.
I know a lot of guys that are doing the index thing.
They don't like to mess with tune or weight unless they absolutely have to.
They can scrub off a bunch of ET by quick shifting. Playing with weight or tune up, affects reaction time.
Good luck.
.
I know a lot of guys that are doing the index thing.
They don't like to mess with tune or weight unless they absolutely have to.
They can scrub off a bunch of ET by quick shifting. Playing with weight or tune up, affects reaction time.
Good luck.
.
